VM: Re-format to use at most one newline between functions

runtime/vm/malloc_hooks_jemalloc.cc

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(DART_USE_JEMALLOC) && !defined(PRODUCT)
 
 #include "vm/malloc_hooks.h"
 
 #include <jemalloc/jemalloc.h>
 
 #include "vm/json_stream.h"
 
 namespace dart {
 
 void MallocHooks::InitOnce() {
   // Do nothing.
 }
 
-
 void MallocHooks::TearDown() {
   // Do nothing.
 }
 
-
 void MallocHooks::PrintToJSONObject(JSONObject* jsobj) {
   // Here, we ignore the value of FLAG_profiler_native_memory because we can
   // gather this information cheaply without hooking into every call to the
   // malloc library.
   jsobj->AddProperty("_heapAllocatedMemoryUsage",
                      heap_allocated_memory_in_bytes());
   jsobj->AddProperty("_heapAllocationCount", allocation_count());
 }
 
-
 intptr_t MallocHooks::heap_allocated_memory_in_bytes() {
   uint64_t epoch = 1;
   size_t epoch_sz = sizeof(epoch);
   int result = mallctl("epoch", &epoch, &epoch_sz, &epoch, epoch_sz);
   if (result != 0) {
     return 0;
   }
 
   intptr_t allocated;
   size_t allocated_sz = sizeof(allocated);
   result = mallctl("stats.allocated", &allocated, &allocated_sz, NULL, 0);
   if (result != 0) {
     return 0;
   }
   return allocated;
 }
 
-
 intptr_t MallocHooks::allocation_count() {
   return 0;
 }
 
-
 bool MallocHooks::ProfilingEnabled() {
   return false;
 }
 
-
 bool MallocHooks::stack_trace_collection_enabled() {
   return false;
 }
 
-
 void MallocHooks::set_stack_trace_collection_enabled(bool enabled) {
   // Do nothing.
 }
 
-
 void MallocHooks::ResetStats() {
   // Do nothing.
 }
 
-
 bool MallocHooks::Active() {
   return false;
 }
 
-
 Sample* MallocHooks::GetSample(const void* ptr) {
   return NULL;
 }
 
 }  // namespace dart
 
 #endif  // defined(DART_USE_JEMALLOC) && ...